Martin Luther King Jr. said, injustice anywhere is a threat to justice everywhere.

Buddhism Day by Day

Wisdom for Modern Life by Daisaku Ikeda
Friday, April 26, 2013:

 

As globalization proceeds, we enter an age in which everybody's actions strongly influence everybody else. When we realize this, we can then alter our mindset and strive to build a global society of mutual coexistence and mutual prosperity. This will be done by going beyond devotion to the interests of the nation-state and devoting ourselves to the interests of all humanity. As Martin Luther King Jr. said, injustice anywhere is a threat to justice everywhere. The key to the solution is the imagination to care for others. It is the empathizing heart or what Buddhists refer to when they talk about mercy.